25 September 2013 Modified plenoptic camera for phase and amplitude wavefront sensing
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Abstract
Shack-Hartmann sensors have been widely applied in wavefront sensing. However, they are limited to measuring slightly distorted wavefronts whose local tilt doesn’t surpass the numerical aperture of its micro-lens array and cross talk of incident waves on the mrcro-lens array should be strictly avoided. In medium to strong turbulence cases of optic communication, where large jitter in angle of arrival and local interference caused by break-up of beam are common phenomena, Shack-Hartmann sensors no longer serve as effective tools in revealing distortions in a signal wave. Our design of a modified Plenoptic Camera shows great potential in observing and extracting useful information from severely disturbed wavefronts. Furthermore, by separating complex interference patterns into several minor interference cases, it may also be capable of telling regional phase difference of coherently illuminated objects.
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Chensheng Wu, Chensheng Wu, Christopher C. Davis, Christopher C. Davis, } "Modified plenoptic camera for phase and amplitude wavefront sensing", Proc. SPIE 8874, Laser Communication and Propagation through the Atmosphere and Oceans II, 88740I (25 September 2013); doi: 10.1117/12.2026259; https://doi.org/10.1117/12.2026259
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